As a writer I know it would be bad for you to copy something someone gives you, so here's my suggestion. Go and look at pictures of hospitals, if you've ever been to one then imagine the smell, the weird scent of the hospital gowns and the rubbery food. The pristine white walls or wallpaper a soft blue to keep patients calm.
I can give you some tips. But you’d have to piece it on your own.
-smells of sanitizer and antiseptic - cream coloured walls with soft yellow lighting -occasional chime of the call button -White linoleum with grey accents on the ground -sound of the nurse wheeling the medicine cart by -patients happily talking to their loved ones -air conditioner blowing at a comfortable temperature, not too warm and and too cold.